drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_debugfs.c

File Facts

System

Linux kernel

Corpus path

drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_debugfs.c

Extension

.c

Size

2744 bytes

Lines

105

Domain

Driver Families

Bucket

drivers/gpu

Inferred role

Driver Families: operation-table or driver-model contract

Status

pattern implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
• Defines an operation table; this is where Linux turns generic core objects into subsystem-specific behavior.
• Touches user memory; correctness depends on fault-safe copying and privilege boundary handling.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/debugfs.h
• linux/device.h
• linux/seq_file.h
• linux/pci.h
• drm/drm_drv.h
• drm/drm_file.h
• drm/drm_debugfs.h
• drm/drm_edid.h
• hibmc_drm_drv.h

Detected Declarations

• function hibmc_control_write
• function hibmc_dp_dbgfs_show
• function hibmc_open
• function hibmc_debugfs_init

Annotated Snippet

static const struct file_operations hibmc_dbg_fops = {
	.owner   = THIS_MODULE,
	.write   = hibmc_control_write,
	.read    = seq_read,
	.open    = hibmc_open,
	.llseek  = seq_lseek,
	.release = single_release,
};

void hibmc_debugfs_init(struct drm_connector *connector, struct dentry *root)
{
	struct drm_device *dev = connector->dev;
	struct hibmc_drm_private *priv = to_hibmc_drm_private(dev);

	/* create the file in drm directory, so we don't need to remove manually */
	debugfs_create_file("colorbar-cfg", 0200,
			    root, priv, &hibmc_dbg_fops);
}

Annotation

• Immediate include surface: `linux/debugfs.h`, `linux/device.h`, `linux/seq_file.h`, `linux/pci.h`, `drm/drm_drv.h`, `drm/drm_file.h`, `drm/drm_debugfs.h`, `drm/drm_edid.h`.
• Detected declarations: `function hibmc_control_write`, `function hibmc_dp_dbgfs_show`, `function hibmc_open`, `function hibmc_debugfs_init`.
• Atlas domain: Driver Families / drivers/gpu.
• Implementation status: pattern implementation candidate.
• This snippet crosses the user/kernel memory boundary; validate fault handling and access checks before translating the pattern.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.